| 摘要 |
A temperature monitoring system for a heater having a flexible, thin-film graphite heater element includes a temperature sensing component that uses the heater element to sense temperature. The temperature sensing component includes a current sensor and a voltmeter circuit for determining a resistance and temperature of the heater element. A temperature control component associated with the heater element receives at least one set point value associated with the heater and controls the temperature of the heater element based on a comparison of at least one of the resistance and temperature of the heater element to the at least one set point value. The temperature of the heater element is calculated, in Ohms, using the following equation:;y=Ax3+Bx2−Cx+D, ;where x=the average temperature of the heater element, in degrees Fahrenheit, and y=the resistance of the heater element as a percentage of the resistance of the heater element at room temperature, where A is from about −20000 to about 25000, B is from about 40000 to about 80000, C is from about 40000 to about 80000, and D is from about 10000 to about 30000. |
| 主权项 |
1. A temperature monitoring system for a heater having a flexible, thin-film graphite heater element comprising:
a temperature sensing component that uses the heater element to sense temperature, the temperature sensing component including a current sensor and a voltmeter circuit for determining a resistance and temperature of the heater element; and a temperature control component associated with the heater element, the temperature control component receiving at least one set point value associated with the heater and controlling the temperature of the heater element based on a comparison of at least one of the resistance and temperature of the heater element to the at least one set point value, wherein the temperature of the heater element is calculated, in Ohms, using the following equation:
y=Ax3+Bx2−Cx+D, where x=the average temperature of the heater element, in degrees Fahrenheit, and y=the resistance of the heater element as a percentage of the resistance of the heater element at room temperature, where A is from about −20000 to about 25000, B is from about 40000 to about 80000, C is from about 40000 to about 80000, and D is from about 10000 to about 30000. |
